CREATE INDEX (Transaction Per Chunk)
CREATE INDEX ... WITH (timescaledb.transaction_per_chunk, ...);
This option extends CREATE INDEX with the ability to
use a separate transaction for each chunk it creates an index on, instead of
using a single transaction for the entire hypertable. This allows INSERTs, and
other operations to be performed concurrently during most of the duration of the
CREATE INDEX command. While the index is being created on an individual chunk,
it functions as if a regular CREATE INDEX were called on that chunk, however
other chunks are completely un-blocked.
note
This version of CREATE INDEX can be used as an alternative to CREATE INDEX CONCURRENTLY, which is not currently supported on hypertables.
warning
If the operation fails partway through, indexes might not be created on all hypertable chunks. If this occurs, the index on the root table of the hypertable is marked as invalid. You can check this by running \d+ on the hypertable. The index still works, and is created on new chunks, but if you want to ensure all chunks have a copy of the index, drop and recreate it.
Sample usage
Create an anonymous index:
CREATE INDEX ON conditions(time, device_id)WITH (timescaledb.transaction_per_chunk);
Alternatively:
CREATE INDEX ON conditions USING brin(time, location)WITH (timescaledb.transaction_per_chunk);
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